compare.py

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#!/usr/bin/env python3.8
 
from os.path import dirname, realpath, join
import numpy as np
import matplotlib.pyplot as plt
from matplotlib import rc
import re
 
rc('font',**{'family':'serif', 'size': 12})
rc('text', usetex=True)
 
dir = dirname(realpath(__file__))
 
def compare_simd(name: str, filename_no_simd: str, filename_simd: str):
    small_no_simd = np.genfromtxt(join(dir, filename_no_simd), delimiter=',')
    small_simd    = np.genfromtxt(join(dir, filename_simd), delimiter=',')
 
    plt.figure(figsize=(6,6*3/4))
    plt.plot(small_no_simd[:,0], small_no_simd[:,1], '-',
            label='Without SIMD intrinsics')
    plt.plot(small_simd[:,0], small_simd[:,1], '-',
            label='With SIMD intrinsics')
    plt.xlim((0, small_simd[-1, 0]*1.025))
    plt.gca().set_ylim(bottom=0)
 
    plt.title("Comparison of \\verb|alpha_overlay_stride|\n" +
            "with and without SIMD intrinsics")
    plt.xlabel('Image size [pixels]')
    plt.ylabel('Time [s]')
    plt.legend()
    plt.tight_layout()
    plt.savefig(name + '.svg')
 
def compare_rescale(name: str, filenames: list):
 
    results = [ np.genfromtxt(join(dir, f), delimiter=',') for f in filenames ]
    legends = [ '\\verb|' + re.split(r' |\.', f)[-3] + '|' for f in filenames ]
 
    plt.figure(figsize=(6,6*3/4))
    for data, legend in zip(results, legends):
        plt.plot(data[:,0], data[:,1], '-', label=legend)
    plt.xlim((0, results[0][-1, 0]*1.025))
    plt.gca().set_ylim(bottom=0)
 
    plt.title("Comparison of \\verb|alpha_overlay_stride|\n" +
              "with different scaling methods")
    plt.xlabel('Image size [pixels]')
    plt.ylabel('Time [s]')
    plt.legend()
    plt.tight_layout()
    plt.savefig(name + '.svg')
 
compare_simd('small', 
             'Wed Jul  8 15:12:30 2020 no-simd.csv',
             'Wed Jul  8 15:13:39 2020 simd.csv')
compare_simd('large', 
             'Wed Jul  8 15:45:17 2020 no-simd.csv',
             'Wed Jul  8 15:50:07 2020 simd.csv')
compare_rescale('rescale-small',
               ['Wed Jul  8 22:47:42 2020 simd div255_round aarch64.csv',
                'Wed Jul  8 22:49:26 2020 simd div255_round_approx aarch64.csv',
                'Wed Jul  8 22:51:09 2020 simd div255_floor aarch64.csv',
                'Wed Jul  8 22:52:49 2020 simd div256_round aarch64.csv',
                'Wed Jul  8 22:54:28 2020 simd div256_floor aarch64.csv'])
plt.show()